<template>
  <div>
    <p>
      <span v-for="(item,index) in arr" :key="index">
        <input type="checkbox" :value="item" v-model="list">{{item}}
      </span>
    </p>
    <p>累加的值和:{{totalNum}}</p>
  </div>
</template>

<script>
export default {
  data () {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      list: []
    }
  },

  computed: {
    totalNum () {
      return this.list.reduce((sum, item) => (sum += item), 0)
    }
  }
}
</script>

<style scoped lang='less'>

</style>
